单项选择题
The function of lubricating oil is to （）.
A.reduce friction between moving surfaces B.provide even distribution of bearing wear C.reduce the accumulation of harmful detergents D.maintain a constant oil temperature output at each beating
单项选择题 In a flash distilling unit, evaporator feed (seawater) first absorbs heat in the （）.
单项选择题 An independent bilge suction is required for （）.
单项选择题 If the pump for a hydraulic anchor windlass is overheating, the cause may be （）.
